It is the second time Mehajer has been involved in a car crash in as many months.

In October, the property developer missed a scheduled court appearance for allegedly assaulting a taxi driver after being involved in a "relatively serious" crash on his way to court. He was taken to hospital in an ambulance, but was discharged later that day.

But the scene of the celebrations were marred by a shooting less than 24 hours before the ceremony began.

John Ibrahim's feared bodyguard, 'Tongan Sam', was shot in the back at Ibrahim's mother's house in the western Sydney suburb of Merrylands on Friday night -- just metres from where the couple would tie the knot the following day.

The bodyguard, Semi Ngata, remains in a serious condition in Westmead Hospital.